Sheet material



FIG. 1 is a front, right perspective view of a sheet material showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being a mirror image;

FIG. 3 is a left side view thereof, the right side view being a mirror image; and,

FIG. 4 is a front view thereof, the rear view being a mirror image.

The sheet material includes a symbolic break along its length drawn in broken line. Any portion of the sheet material between the break lines forms no part of the claimed design. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for a sheet material, as shown and described. 